/Engine/Source/Developer/TargetPlatform/Public/Interfaces/ITargetPlatform.h
Returns custom DeviceManager widget creator for this platform
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IDeviceManagerCustomPlatformWidgetCreator](API\Developer\TargetPlatform\Interfaces\IDeviceManagerCustomPlatformWidg-) > GetCustomWidgetCreator() const